342 
BULLETIN OF THE UNITED STATES FISH COMMISSION. 
THE KIDDER-FLINT WATER BOTTLE. 
The Kidder-Flint water bottle (plate xxv) is designed to bring np a specimen 
of water from any desired deptli, retaining the free gases for the purpose of analysis. 
The valves close mechanically when the ascent is begun, and can not be opened again 
except by hand. Tlierefore it may be used iu series. 
All parts of this water bottle are brass, except the ]iropeller blades, which are 
of German silver. The cylinder is a tube of commercial pattern; the frames, valves, 
valve seats, etc., are cast brass. 
Cuts 51 and 52. — Side and bottom view 
of outer arms of propeller frame. 
Cuts 53 and 54. — Side and bottom view 
of inner arms of propeller frame. 
Cut 55. — Side view of frame h, show- 
ing clamp c. 
Cut 5fi. — Front view of frame h, clamp 
c, and clamp n. 
Cut 57. — Side view of frame 1>, clamp 
u, and 21 in v. 
Cut 58. — Side view of sleeve i and front 
view of beveled slots h k. 
Cut 59. — Side view of xiropeller, show- 
ing beveled lugs. 
Cut 60. — Bottom view of propeller. 
Preparation for use . — Cleanse the inside of the cylinder from all foreign sub- 
stances, particularly verdigris, oil, or red lead, which is sometimes used for making 
joints. Clean the valve faces and valve seats with a soft cloth, avoiding brick dust, 
emery paper, or other scouring substances, as the valves are very carefully ground 
in, and any scratch on their faces renders them liable to leak. The valve seats should 
be removed for cleaning and replaced again, using spanners in the holes op> for the 
purpose, and to insure tight joints without undue strain a little red lead may be used 
on the shoulder between m and n. In cleaning the cylinder particular attention 
should be given to the cock e and expansion chamber d. 
The iiropellers should be examined to see that they work freely on the sleeves 
and the supporting screws on their outer extremities. The shafts should be run ui) 
